Protective case



FIG. 1 is a front perspective view of a protective case;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left elevation view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a right elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front elevation view thereof, shown in an open position;

The broken lines in the drawings illustrate portions of the protective case and form no part of the claimed design. 

CLAIM The ornamental design for a protective case, as shown and described. 